A143709 (1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, 13, 2*7, 3*5,..) becomes (1^2+3, 2^2+5, 2^3+7, 2^3+3, 2^2+5, 11^2+2, 3^13+2, 7^3+5,..).

4, 9, 15, 11, 9, 123, 1594325, 348, 33, 10, 363, 132, 2071, 11, 27, 2200, 11, 844, 4656612873077392578127, 136, 131077, 51, 46, 524291, 172, 45474735088646411895751953127, 2230, 15, 14, 8388655, 19, 51, 28, 291

Offset

1,1

Links

Table of n, a(n) for n=1..34.

Example

a(8)=7^3+5=343+5=348.
a(9)=2^4+17=16+17=43.
a(10)=2^3+2=8+2=10.
a(11)=19^2+2=361+2=363.
a(12)=5^3+7=125+7=132.
a(13)=2^11+23=2048+23=2071,
etc.

Crossrefs

Cf. A141287, A141261, A136735.

Sequence in context: A247013 A122499 A350419 * A010446 A243173 A345452

Adjacent sequences: A143706 A143707 A143708 * A143710 A143711 A143712

Keyword

nonn

Author

Juri-Stepan Gerasimov, Nov 13 2008

Extensions

Corrected (15 replaced by 9, 43 by 33) and extended by R. J. Mathar, Apr 18 2010

Status

approved